MDI is an isocyanate that is a reactive chemical that is irritating to the eyes, skin, and respiratory system. It can also result in many other health issues, especially bronchial issues and asthma. 12 years ago when Peace Valley OSB was proposed, they assured the public they would not use MDI & that they had safer ways to manufacture the board. Peace Valley OSB has now applied to use MDI, which has a 30 day deadline (which ends on December 28th) which is inconveniently over the busiest holiday season. Please sign this protest to stop these chemicals from getting in our air!!